Vacuum-tube mounting for radio apparatus



Jan. 18,1927. 1,614,696

a. SKELLY VACUUM TUBE MOUNTING FOR RADIO APPARATUS Filed June 25, 1926' E1513 F EEE Patented Jan. 18, 1927.

[Intranet-Ares ei-tees FATENT orrice.

BERNARD H. SKELLY, F BRIDGEPORT, CONNECTICUT, ASSIGNOR 'i-u AMERICAN S39E- emmr our.

00., INCL, OF BRIDGEPORT, CONNECTICUT, A CORI ORATION OF CONNECTI- vacumsFe-runs MOUNTING son name arranarus.

Application filed .Time 26, 1928. Serial Ko.-118,66&.

This invention has reference to the vacuum tubes used in radio apparatus, but more particularly relates to t e mounting of said tubes in such manner that they are.

tively utilized as vibratory or stationary,

tubes at the will of, the 0 erator. 4

In the. accompanying rawin Figure 1 is an'elevation of t 1e assembled device in perspective Figure 2 a detail side elevation of the vacuum tube Figure 3 is a plan view of the device with the. tube removed- Figure 4 is a section at the line 4-4 with the screw relaxed- A Figure 5' is a similar section with the screw tightened- Figure 6 is a bottom view of the base l igurc 7 is a perspective of the bae with platform removed, and 15 Figure Sis a bottom view of the platform.

Tubes of this description that are vibrai'ory so as to he shock absorbing are well known, and, under some circumstances p03- se=s advantages, but these tubes are general so ly stationary, since, under most. conditions, stationary tubes are preferable, and since it is quite expensive and confusing to keep two sets of tubes on hand, and to use them alternately, as conditions change, the present style of tube mounting has been devised, so that the same tube can in an instant be converted from a vibratory to a stationary tube and vice versa, and the. invention will be readily understood from the following description,- refcrenee being; had tothe accompanying drawing, similar numerals being used to designate like parts in the several figures.

l is a base of: any suitable insulating material, and 2 the wiring terminals mounted on said base and connected with upwardly ex tend ng resilient contacts 3 for engaging the-electrodes of a vacuum tube 4, these ele trodes comprising pins 5, 6, the pins 5 being preferably larger than the pins 6 for the purpose presently explained. l

7 is a platform of insulating material for supportingtlielube and fprmed with comparatively large perforatlons 8 comparatively small erforations 9 .throughfit which the large an small pins 5, 6, arcinscrtcd in the mounting of the tube on said platform, and these perforations lead into enlarged recesses 10 into which the contacts' 3 are inserted when the platform is.assembled relatively to the base.

These contacts at their upper ends have resilient offsets 11 which normally extend in the vertical planes of the perforations 8, 9, so as to be Within the path of the pins 5, 6, when the latter are mounted on the platform, so that it will be clear that these pin electrodes will have good contact with the wiring terminals 2.

Also, when the platform'is assembled on 16 I the base,vthe upper walls of the recesses 10 will rest on these contacts 3 so that it will be evident that the platform and its tube will be oscillatory.

Extending through the centers of the platform and base are alined perforations 12, 13,- the latter having an interiorly threaded bushing 14, and a screw 15 passed loosely through the perforation 12- is driven into the bushing 1}, whereby the platform and base are secured in their assembly, and this screw may be driven intothe bushing more or less so as to vary the tension on the resilientcontacts and consequently the delicacy of the vibratorymotions of the platform and tube.

\Vhen it is desired to convert the oscil latory tube into a stationary tube,-the screw is driven so as to bind the platformagainst. the base in opposition to the resiliencylof the spring contacts, but the relaxation of the screwwill instantly transform the rigid tube into an oscillatory tube, since the recovery of the spring contacts will separate the plat- V form and base.

In order to aid these contacts I preferto employ a coil spring 16 which surrounds the screw and is housed within arecess 17 in the bottomofthe platform, and which is com-- resscd when the screw is driven into the ushing 14, and which, separate the platform and the base when the. screwis relaxed, and also contributes toward the'resilientsupporting of the platform.

This coil s ring may be omitted, if desired, and alt ough I prefer to use it, the io5 tube may engage the proper spring. contacts,

therefore, acts to other two; and the correspondmg perforations in the platform are made to accommodate these comparatively lar e and small pins, so that it will be impossi le t0 im ro'perly assembletubes onthe platform, this being an ordinary expedient.

1. In a vacuum tube mounting, an insulated base having wiring terminals provided with upstanding resilient contacts, a platformsupported by said contacts, and adj ustable means for-spacing apart said platform and base or for securing them rigidly together, whereby said mounting may be selectivelyvibratory or stationary.

lated platform, an insulated base, resilient contacts carried by the base and on which said platform is mounted, and a screw extending loosely through-said platform and having a threaded engagement with said base, whereby said-base and platform may be rigidly boundtogether or may be held in asingidly securing them together, whereby said -platform may be selectively vibratory or stationary.

4. Ina vacuum tube mounting, an insulated base ha viag wiring terminals provided with upstanding. resilient contacts, a platform, resilient means interposed between said platform and base, and adjustable means for 2. Iii--11 vacuum tube mounting, an msuspacing apart said platform and base or for securing them rigidly together, whereby said .platform may be selectively vibratory or st-ationary.

In testimony' whereof I afiixmy signature hereto.

BERNARD SHELBY. 

